While reviewing properties in Tampa, I recently came across a case where someone mistakenly considered the amount left after deducting the mortgage payment from the rent as net income. If you assume that the remaining cash is the return, your benchmarks can become inconsistent when comparing different properties or areas. By organizing this part with actual figures from Tampa, the differences become clear.

According to data from 2026, the average rent for apartments in Tampa is $2,014 per month, and the average home value based on Zillow is $376,278. The total return, calculated by dividing the annual rental income of $24,168 by the purchase price, is about 6.4 percent. This figure demonstrates the potential of the property itself, regardless of whether a loan is involved.

The next step is the cap rate. This is the value obtained by dividing the net operating income (NOI), which is the total income minus property taxes, insurance, management fees, maintenance costs, and vacancy losses, by the purchase price. Hillsborough County, where Tampa is located, has an effective property tax rate of 1.29 percent according to Ownwell data, which is relatively high among the Florida areas examined, second only to Miami-Dade. Applying the 50% rule, assuming total operating costs are half of the total rental income, the NOI is $12,084 annually, and the cap rate drops to about 3.2 percent.

Up to this point, the calculations are independent of whether a loan is involved. When considering cash-on-cash return, the loan terms significantly affect the results. Assuming a 30-year fixed rate of 6.67 percent as of August 13, 2026, from Freddie Mac, with a 20 percent down payment, the annual principal and interest payment exceeds $23,000. If you subtract just the principal and interest from the rental income, the remaining cash could be nearly zero or even negative. This remaining cash, or the pre-tax cash flow, divided by the actual cash invested gives the cash-on-cash return.

Referring to the amount left after deducting the mortgage payment as net income and dividing that amount by the invested cash according to the cash-on-cash formula yields entirely different results. For example, if a total of $86,500 was invested for the down payment and closing costs, and the pre-tax cash flow is negative, the cash-on-cash return will also be negative. Simply looking at whether there is money left in the bank each month can lead to missing this ratio entirely.

Revisiting the 1% rule reveals another noteworthy signal. Dividing the monthly rent of $2,014 by the purchase price of $376,278 gives 0.54 percent, which is relatively good among the cities examined, but still falls short of the 1 percent benchmark. It is safer to consider this rule alongside cap rate and cash-on-cash return rather than making a purchase decision based solely on it.

From the perspective of total return, even during periods when cash-on-cash is negative, the principal on the loan accumulates as an asset, and Tampa is a region with a solid employment base due to its port and healthcare industry, which raises the possibility of long-term capital appreciation. However, these factors should be weighed differently from the currently calculable cap rate or cash-on-cash return, as they represent potential rather than guaranteed income.

Tampa has seen an increase in rental demand due to population influx and business relocations in recent years, but just because the cap rate is positive does not mean that cash-on-cash will automatically be positive as well. Both metrics need to be calculated side by side to make an informed investment decision.

If you are preparing to move to Tampa, you should also consider that Florida's hurricane insurance market has experienced rising premiums and some insurers withdrawing in recent years. Obtaining actual insurance quotes before purchasing can reveal that operating costs may be higher than expected, so it is wise to reflect actual quotes in your cap rate calculations for a recheck. Families considering school districts should note that there can be significant disparities in school district ratings even within the Tampa area.

Property tax rates and insurance premiums can vary based on the exact address and insurance company, so please verify directly before signing any contracts. This article is not investment or legal advice, and it is recommended to review with a real estate professional or accountant before making any purchases.